Checking The Battery Acid Level; Ignition System - Husqvarna Rider ProFlex 21 II Operator's Manual

Checking the Battery Acid Level

Check that the acid level in the battery lies
between the markings. When refilling, only
distilled water may be used to fill the cells.
!
WARNING!
What to do in case of contact with
battery acid
External: Rinse thoroughly with water.
Internal: Drink large quantities of water
or milk. See a doctor as
soon as possible.
Eyes: Rinse thoroughly with water. See
a doctor as soon as possible.
The battery emits explosive gases. Sparks,
flames, and cigarettes must not be present
in the vicinity of the battery.

Ignition System

The engine is equipped with an electronic ignition system. Only the spark plugs require maintenance.
For recommended spark plugs, see Electrical system on page 61.
IMPORTANT INFORMATION
The wrong spark plug type can damage the engine.
1. Remove the ignition cable shoe and clean around the spark plug.
2. Remove the spark plug with a 13/16" (21 mm) spark plug socket wrench.
3. Check the spark plug. Replace the spark plug if the electrodes are burned or if the insulation is cracked
or damaged. Clean the spark plug with a wire brush if it is to be reused.
4. Measure the electrode gap with a gapping tool. The gap shall be 0.75 mm/ 0.030". Adjust as necessary
by bending the side electrode.
5. Reinsert the spark plug, turning by hand to avoid damaging the threads.
IMPORTANT INFORMATION
Inadequately tightened spark plugs can cause overheating and damage the engine.
Tightening the spark plug too much can damage the threads in the cylinder head.
6. After the spark plug is seated, tighten it using a spark plug wrench so that the washer is compressed.
A used spark plug should be turned 1/8-1/4 of a turn from the seated position. A new spark plug should
be turned 1/2 a turn from the seated position.
7. Replace the ignition cable shoe.
MAINTENANCE
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